US3531219A - Automatic bilge pump - Google Patents

Automatic bilge pump Download PDF

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Publication number
US3531219A
US3531219A US805427A US3531219DA US3531219A US 3531219 A US3531219 A US 3531219A US 805427 A US805427 A US 805427A US 3531219D A US3531219D A US 3531219DA US 3531219 A US3531219 A US 3531219A
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US
United States
Prior art keywords
piston
pump
cylinder
pendulum
shaft
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US805427A
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English (en)
Inventor
Francis K Fox
John W Munce
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FRANCIS K FOX
JOHN W MUNCE
Original Assignee
FRANCIS K FOX
JOHN W MUNCE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of US3531219A publication Critical patent/US3531219A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control

Definitions

  • Non-slip belt drive operates pump piston in response to slightest pendulum motion, and with equal efiiciency for a wide angle of pendulum positions.
  • a further disadvantage of prior art Wave motion pumps is the inability of the pump to prime itself, and also the inability of the pump to operate efficiently under relatively small wave motions.
  • the present invention is particularly directed to an improved automatic bilge pump, which is equally efiicient under circumstances of large or small motions producing a pendulus action of a suspended weight, and which is completely self-priming.
  • the present invention comprises what may be properly termed an automatic bilge pump in that the pump hereof operates entirely without the application of power ice from any type of motor, or the like. Furthermore, the pump operates without the necessity of priming thereof.
  • an improved pump piston drive arrangement and the provision of particular check valves. More specifically, there is herein provided an adjustable, double-belt piston drive from a pendulum, with the piston being arranged for double action, so that even the slightest motion of the pendulum produces a pumping action.
  • check valve balls having a specific gravity only slightly greater than that of water, and being slightly flexible and resilient, produces perfect valve seating and immediate positive pumping action with the slightest piston motion.
  • FIG. 1 is a side elevational view of a preferred embodiment of the invention partially in schematic taken in plane 1-1 of FIG. 2;
  • FIG. 2 is an end elevational view of the automatic bilge p p;
  • FIG. 3 is a sectional view, taken in the plane 33 of FIG. 1;
  • FIG. 4 is a sectional view, taken in the plane 44 of FIG. 3;
  • FIG. 5 is a sectional view, taken in the plane 55 of FIG. 2;
  • FIG. 6 is a sectional view, taken in the plane 66 of FIG. 5.
  • FIGS. 1 and 2 of the drawing there will be seen to be illustrated a preferred embodiment of the present invention, including an upright stand, or housing 11, having spaced apart vertical side members 12 and 13, with a shaft 14 rotatably mounted therebetween adjacent the tops thereof.
  • a pendulum 16 depends from this shaft in the form of a weight 17 and relatively vertically disposed bar 18 secured between the weight and shaft.
  • the weight 17 may be secured to the bar 18 by any suitable means, such as, for example, extension of the bar through an opening in the weight and nuts threaded upon the bar against the weight, as illustrated.
  • Pumping is performed by a piston 21, slidably mounted in a generally horizontally disposed cylinder 22, as illustrated in FIGS. 3 and 4.
  • This cylinder may be mounted upon bottom crosspieces 23 extending between the side members 12 and 13.
  • the cylinder 22 is provided with a pair of aligned longitudinal slots 24 through the sides thereof, and a pin 26 extends through the center of the piston 21 and exteriorly of the cylinder through these slots for engagement by belt drive means described below.
  • the piston 21 is adapted to be reciprocated back-andforth within the cylinder, and a very small clearance is provided between the piston and cylinder 'walls with the piston having a substantial length, so as to minimize any leakage along the cylinder at the piston sides.
  • inlet and outlet means 28 which may take the form of plates secured to the cylinder ends.
  • th se means may be provided in the form of a plate or body 29, having a lower inlet opening 31 and an upper outlet opening 32.
  • a cylindrical insert 33 is threaded upwardly into the lower opening 31 with an opening therethrough, and is provided with an outwardly tapering upper surface 34 forming a valve seat.
  • a ball 36 formed of a slightly flexible and resilient material, such as a plastic, and having a specific gravity only slightly greater than that of water. This ball 36 normally rests upon the valve seat 34 to close the opening 31, but is free to move upward under the force of suction from the pump piston 21 to open the inlet for drawing water into the cylinder 22.
  • An upper cylindrical insert 37 is threaded vertically downward into the top opening 32 in the end plate, with an opening through such cylinder for the exit of water discharged by the pump.
  • another ball 38 which may be identical to the ball 36 described above, and which normally rests against a valve seat 39 formed about the opening 32 interiorly thereof, as shown.
  • This upper opening 32 has a reduced diameter extending into the cylinder from the valve seat, and an enlarged portion on the opposite side of the valve seat to accommodate the ball 39 and allow movement of the ball away from the valve seat under pressure of water pumped by the piston from the cylinder.
  • inlet and outlet ball check valves at each end of the cylinder, so that piston reciprocation will alternately raise the inlet check valve ball 36 to draw water through the inlet Opening 31 into the cylinder, and return travel of the piston will seat the inlet check valve and unseat the outlet check valve ball 38 to force the water upwardly out of the discharge opening 32.
  • the pump is double-acting, and the cylinder is thus provided with the same inlet and outlet means 28 at each end theerof.
  • the inlet openings 31 at opposite ends of the cylinder are connected together by appropriate piping 41, which extends by means such as a rubber hose, or the like 42, to a strainer 43 located in the bilge of a boat 44.
  • This disposition of the inlet line 42 is only schematically illustrated in FIG. 1, and, of course, the physical location of the strainer at the end of the flexible line may be disposed as desired in the vessel, but preferably at the lowest point available, in order to minimize the amount of water than can accumulate in the bilges.
  • the outlet openings 32 of the end plates 28 are likewise connected together through suitable piping 46 which may have a flexible discharge line 47 extending therefrom for disposition over the side of the vessel, as schematically shown in FIG. 1.
  • FIGS. 2 and 5 wherein it will be seen that the rotatable shaft 14 is mounted at the ends thereof in bearings 51 and 52 carried by the uprights 12 and 13 above the pump cylinder.
  • the pendulum 16 is secured to this shaft 14 at the center thereof, and this may be accomplished by any suitable means so that motion of the pendulum weight rotates the shaft.
  • a pair of like belt wheels 53 and 54 are mounted upon the shaft on opposite sides of the pendulum bar 18. Inasmuch as these belt wheels 53 and 54 are alike, only one is described in detail, and is illustrated in FIGS. and 6.
  • the wheel 54 is formed of two like discs 61 and 62, with each having a peripheral groove thereabout and a central opening therethrough for passage of the shaft 14.
  • the relative angular orientation of the discs 61 and 62 is adjustable, as by means of a bolt 63 extending through a curved slot 64 in one of the discs 61 and threaded into the other disc 62.
  • the entire wheel itself is angularly adjustable with respect to the shaft 14. This is illustrated to be accomplished by means of a pair of blocks 66 and 67 having facing circular indentations therein for engaging the shaft 14.
  • One of the blocks 67 is secured to the disc 62, as by bolts, and the other block is attachable to the secured block 67 as by means of bolts 68 extending through the block 66 and threaded into the block 67.
  • the wheel With the bolts 68 loosened, the wheel may be turned to the desired angular position on the shaft 14 and the bolts 68 then tightened to clamp the blocks together on the shaft, and thus lock the wheel in desired angular relation to the shaft.
  • the reasons for adjustability of the belt wheels will become apparent from a consideration of the belt arrangement employed herein and described below.
  • the pump piston 21 is reciprocated by a transverse d-rive pin 26 extending laterally through the center thereof and through the longitudinal slots 24 in the sides of the cylinder 22.
  • Connection between the piston drive pin 26 and the belt wheels 53 and 54 rotated by the pendulum 16 is provided by two pairs of belts 71, 72 and 73, 74.
  • belts 71, 72 it is noted that each extends at least partially about the upper wheel 54 in separate peripheral grooves thereof.
  • the ends of each of these belts are knotted or formed with a bulbous termination and the belt is fitted in a generally radial slot 76 in the wheel disc with the end extended outwardly therefrom, so as to lock the end of the belt to the disc of the wheel.
  • the belts then extend about and downwardly from the wheel 54, and about pulley wheels 77 mounted at opposite ends of the cylinder 22 (FIG. 1).
  • the belts 73 and 74 are likewise connected to the wheel 53, and extend downwardly and away from each other about spaced pulley wheels 78 at opposite ends of the cylinder, but on opposite sides thereof from the pulley wheels 77.
  • These lower pulley wheels 77 and 78 will be seen to be mounted in pairs at opposite ends of the cylinder 22 for rotation. Such mounting may, for example, be accomplished by axles such as the axle 79 of FIG. 4.
  • the belts 73 and 74 extend about the rotatable pulley wheels 78 which have their lower periphery aligned with the piston drive pin 26 and the lower belt ends are aflixed to opposite ends of a connecting plate 81 secured to one end of the drive pin.
  • the other pair of belts 71 and 72 extend about the pulley Wheels 77 into connection with a connecting plate 82 affixed to the opposite end of the drive pin, as clearly shown in FIG. 3, for example. It will be seen that with this construction and belt connection swinging of the pendulum 16 to rotate the shaft 14 will cause the belts to reciprocate the piston 21.
  • piston drive forces be equally and accurately applied to the pump piston from the pendulum.
  • the piston is driven by pairs of belts connected to opposite ends of the piston drive pin.
  • the piston very tightly fits the cylinder it is quite important that equal forces be applied to both ends of the drive pin to prevent binding of the piston.
  • the slightest motion of the pendulum will move the piston in the cylinder to achieve a pumping action under these circumstances.
  • the belts connected as described above it is possible to adjust the relative angular positions of the two discs of each pulley wheel and also to adjust the angular position of the wheel relative to the shaft 14. In this manner then the apparatus is adapted for very precise adjustment of piston drive from the pendulum.
  • the automatic bilge pump of the present invention is adapted to be employed in a boat or the like subject to wave motion so that the pendulum swings to and fro to pivot the shaft 14 back and forth and thus reciprocate the pump piston.
  • the automatic bilge pump of this invention be constructed of corrosion resistant and rust resistant material.
  • the pendulum weight 17 may be formed of lead or the like, structural portions of the device are preferably formed of brass, stainless steel, or other hi hly stable and relatively impervious materials. This point is particularly important for the cylinder and piston of the pump itself for in many applications of the invention this portion of the device may be submerged, possibly in salt water.
  • a further point of particular interest and great advantage is the ability of the present device to operate While tilted at a very substantial angle. It will be appreciated that a vessel such as a sailing vessel underway is normally heeled over to port or starboard and yet bilge pumping should continue. Even though the device as illustrated in FIG. 1 be tilted in the plane of the figure through a substantial angle, the pendulum will continue to oscillate by wave motion and to impart a reciprocating action to the pump piston even through such piston may not then be located at the center of the cylinder. Pumping action continues under these circumstances, for even the slightest movement of the piston in the cylinder causes water to be drawn into one end of the cylinder and discharged therefrom upon return motion of the piston while the reverse effect is occurring at the opposite end of the cylinder. It is particularly noted that formation of the balls of the inlet and outlet check valves from a slightly resilient material having a specific gravity only slightly greater than that of water produces a very highly efficient valving action. The check valves seat extremely well but unseat very easily under pump action.
  • An improved automatic bilge pump comprising:
  • the pump of claim 1 further defined by said ballcheck valves each having a slightly resilient ball with the specific gravity thereof slightly greater than that of water.
  • the pump of claim 1 further defined by a pair of wheels adjustably affixed to said shaft directly above said pulley Wheels and said belts extending into engagement with said wheels.
  • each of said wheels comprising a pair of discs upon said shaft with one belt attached to each disc, and means locking said discs together in adjustable angular orientation about said shaft.
  • the pump of claim 1 further defined by said pulley wheels being rotatably mounted with the lower periphery of each aligned in a plane of the piston axis and the ends of said drive pin.
  • the pump of claim 1 further defined by the means (d) comprising upright rigid side members, lower cross members mounting said cylinder, and upper cross members extending between said side members at least as high as said shaft whereby the upper cross members are out of the way of said pendulum as same swings, even with the apparatus tilted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US805427A 1969-03-10 1969-03-10 Automatic bilge pump Expired - Lifetime US3531219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80542769A 1969-03-10 1969-03-10

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US3531219A true US3531219A (en) 1970-09-29

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US805427A Expired - Lifetime US3531219A (en) 1969-03-10 1969-03-10 Automatic bilge pump

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US (1) US3531219A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1232178A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3517378A1 (de) * 1985-05-14 1986-11-20 Fa. Röttger Jansen-Herfeld, 5630 Remscheid Fliehkraftbetaetigte kolbenpumpe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2490484A (en) * 1948-08-21 1949-12-06 Ballard F Snyder Hydraulic pump
US2493050A (en) * 1946-10-24 1950-01-03 Chester I Weir Gravity actuated boat pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2493050A (en) * 1946-10-24 1950-01-03 Chester I Weir Gravity actuated boat pump
US2490484A (en) * 1948-08-21 1949-12-06 Ballard F Snyder Hydraulic pump

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GB1232178A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1971-05-19

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